JPH02242076A - Manufacture of heat insulating box body for refrigerator and the like - Google Patents

Abstract

PURPOSE:To contrive the simplification of assembling process as well as the saving of material cost and prevent a side wall from producing the impact trace of impact even if it is pushed by a method wherein the outer peripheral flanges of a bottom plate are bend with a comparatively large bending radius so as to be expanded outwardly and the outer peripheral flanges are abutted against the inner surface of the side wall while heat insulating material is filled into and foamed in a space between an outer casing and an inner casing under a condition that the side wall is pushed from the outside thereof by a foaming jig. CONSTITUTION:The outer peripheral flanges 30 of a bottom plate are bent at bending parts R with a comparatively large radius and are not risen up vertically but are expanded outwardly so as to slanted outwardly. The parts of side walls 13, 14, which are opposed to the bottom plate 2, are deflected so as to be inflated outward slightly while only the tip ends 30a of the outer peripheral flanges 30 of the bottom plate 2 are abutted against the inner surfaces of the side walls 13, 14. The side walls are pushed from the outside thereof by a foaming jig 35. According to this method, the tip ends of the outer peripheral flanges 30 are pushed inwardly so as to become orthogonal to the bottom plate 2 substantially whereby the tip ends 30a and the outer surfaces of the outer peripheral flanges 30 are contacted closely with the inner surfaces of the side walls 13, 14 by the elastic force of themselves. The stock solution of heat insulating material is poured between the outer casing 3 and the inner casing 7 to constitute a heat insulating box body 11 by filling heat insulating material 10 between both casings 3, 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for manufacturing a heat insulating box used in refrigerators and the like.

(b) Conventional technology A type insulation box body compared to the conventional one is, for example,
As shown in the publication, the bottom plate constituting the outer box is placed at a predetermined position on the inner surface of the lower part of the side wall, and the abutment area between the bottom plate and the side wall is sealed with putty or the like to prevent leakage of the insulation material filled with foam inside. Was.

(c) Problems to be Solved by the Invention This configuration requires personnel to perform the sealing work before foaming the insulation material, and also adds material costs, resulting in a cost disadvantage. was.

The present invention has been made to solve these problems.

(d) Means for Solving the Problems The present invention is characterized in that the seven outer periphery flange of the bottom plate constituting the outer box of a heat insulating box for a refrigerator or the like is bent to expand outward with a relatively large bending radius. , the outer periphery flange is brought into contact with the inner surface of the side wall constituting the outer box, the side wall is pressed from the outside with a foaming jig, and a heat insulating material is foamed and filled between the outer box and the inner box to form a heat insulating box. It is something that is manufactured.

(E) Function According to the present invention, the outer periphery 7 langes of the bottom plate are pushed into close contact with the inner surface of the side wall by their own elastic force due to the pressing force of the foaming jig, and serve as a seal when filling the insulation material with foam. or,
Since the outer periphery flange is bent with a relatively large bending radius, so-called dents will not occur during side wall pressing.

(f) Embodiments Next, embodiments will be explained with reference to the drawings. Figure 1 shows refrigerator 1
shows a sectional view of the bottom. Reference numeral 2 designates the bottom plate of the outer box 3 that opens forward, which constitutes the ceiling wall of the machine room 4 at the bottom of the refrigerator l, and is formed by bending a pre-painted thin steel plate (hereinafter referred to as the painted steel plate). .

Further, 5 is a back plate of the outer box 3, and 6 is a front plate. 7 is outer box 3
It is an inner box made of synthetic resin that is incorporated into the inner box and has a storage chamber 8 inside, and the outward flange 7a on the front opening edge is inserted into and engaged with the groove on the opening edge of the outer box 3. Front plate 6
It is engaged with a groove 6a that opens above the upper edge. Here, the outer box 3 is also constructed by bending a thin coated steel plate.

A heat insulating material 10 such as urethane foam is injected between the outer box 3 and the inner box 7, which are equipped with the bottom plate 2, back plate 5, front plate 6, etc., as described later, and is filled using an on-site foaming method to form a heat insulating box. 11
It constitutes.

Next, FIG. 2 shows a sectional view taken along the line A--A in FIG. 1, and FIG. 3 shows a perspective view of the bottom plate 2. The rear half of the bottom plate 2 is elevated to form a storage space for a compressor (not shown) in the machine room 4, and a high portion 2a is formed. 12.
Reference numeral 12 designates a pair of pedestal angle legs each having a bottom side 12a, a rear side 12b, and a front side 12c, each of which is formed by bending a thick painted steel plate and has an oval-shaped cross section. The base leg angles 12 and 12 are attached along the inside of the lower edge flanges 13a and 14a of the left and right side walls 13 and 14 of the outer box 3, respectively, and are located at the lower edge of the outer box 3. has pedestal 1
6.16 will be installed on the front and rear.

The outer periphery 7 is bent upward on the left and right edges and the front and rear edges of the bottom plate 2.
A lunge 30 is formed. The corner portion of the bottom plate 2 is a mounting portion 31 formed at the upper part of the rear side 12b of the base leg angle 12.
It is mounted and fixed on a mounting portion 32 formed at the upper end of the front side 12c with screws (not shown), and each outer periphery flange 30 is attached to the left and right side walls 13 and 14 of the outer box 3, the inner surface of the back plate 5 and the front plate 6, as described later. comes into contact with.

18 is a pair of handle members. The handle members 18 and 18 are similarly constructed of bent painted steel plates, and each has an inner side 18.
a, base side 18b, outside side 18c, fixed side 18d bent inward at right angles from the upper end of inside side 18a, and outside side 18c
The contact side 18e is bent inward from the upper end at a right angle. Furthermore, the bottom side 18b has a hole 19 for inserting a finger and a folded part 22 on the front and rear edges thereof, and the base leg angle 12
12 and the bottom plate 2 located above, a little forward of the center of the insulation box 11 (for example, if the overall depth is 500 mm, 2 QOmm from the front end),
8b to the bottom side 12a of the base leg angle 12 with the screw 20.
Furthermore, the fixed sides 18d are attached to the bottom plate 2 by abutting and fixing them with screws 21, respectively. At this time, the contact sides 18e and 18e contact the bottom plate 2 inside the left and right side walls 13 and 14 of the outer box 3.

The bottom side 18b of this handle member 18.18 is the base leg angle 1.
2.12, and the fixed side 18d and the abutting side 18e abut on the bottom plate 2, thereby reinforcing the base leg portion of the refrigerator 1. Therefore, deformation accidents caused by falling during transportation can be suppressed without attaching special reinforcing members in addition to the base leg angles 12, 12. In addition, since the handle member 18.18 connects the base leg angle 12.12 and the bottom plate 2, the handle member 18 is useful for positioning the bottom plate 2 when installing the base plate 2, especially when using a painted steel plate that cannot be fixed by welding. play a role. Furthermore, the handle member 18.18 is attached to the heat insulating box body 11.
Since it is attached a little forward of the center part, as in the case where it is attached to the front end of the insulation box 11,
The rear lower end of the refrigerator 1 does not come into contact with the ground during transportation. On the other hand, since the handle member 18.18 is not too deep, it becomes easy to hook the handle member with fingers. This also leads to an improvement in the reinforcing effect of the base legs. That is, the handle member 18
．． Reference numeral 18 serves to reinforce the vicinity of the center of the heat insulating box 11 other than the ridge of the heat insulating box 11 reinforced by the base leg angle 12. Here, a notch 25 is formed in the base leg angle 12.12 corresponding to the hole 19 of the handle member 18.18 so as not to interfere with insertion of fingers.

Next, the procedure for assembling the heat insulating box 11 will be explained using FIG. 4. In addition, Fig. 4 shows Fig. 2 B- before foaming of the insulation material 10.
It is a figure corresponding to the B line cross section. Outer circumference 7 of bottom plate 2 Lunge 3
0 is bent at the bending part R with a relatively large radius of 3 to 5 mm (usually about 0.5 ROM) as shown in Figure 4, and it does not stand up at a right angle but expands outward. and make it slope outward. Side walls 13 and 14 have pedestal angles 12
．． 12, back plate 5, front plate 6, bottom plate 2, and handle member 18.
18 is attached as described above and incorporated into a predetermined foaming jig 35. At this time, the portions of the side walls 13 and 14 corresponding to the bottom plate 2 are bent and slightly bulged outward as shown in FIG.
Only the tip 30a of the outer peripheral flange 30 of the bottom plate 2 is in contact with the inner surfaces of the side walls 13 and 14. In this state, the foaming jig 35 is pressed from the outside as indicated by the arrow in FIG. 4. As a result, the tip 30a of the outer circumference 7 flange 30 is pushed inward until it becomes approximately perpendicular, so that the tip 30a and the outer surface of the outer circumference flange 30 are pressed against the inner surfaces of the side walls 13 and 14 by their own elastic force. be close At this time, since the bent part R is bent with a relatively large radius, even if it is pushed from the outside, this part will not become an edge, and therefore this part will not bulge outward, causing a so-called dent. . Moreover, metal hardening of the bottom plate 2 itself can be suppressed, and elastic force can be fully exerted.

In this state, inject the insulation material stock solution between the outer box 3 and the inner box 7,
A heat insulating material 10 is filled between both boxes 3 and 7 to form a heat insulating box body 11. This state is shown in FIG. At this time, the tip a and the outer surface of the outer peripheral flange 30 of the bottom plate 2 are connected to the side wall 13.
．． 14 Since it is in close contact with the inner surface, seal this part,
The leakage of the heat insulating material 11 from there is prevented or suppressed.

Therefore, conventional sealing materials such as putty and tape can be abolished or reduced.

In the embodiment, the outer peripheral 7 flange 30 is bent upwardly, but the present invention is not limited thereto, and it may be bent downwardly. However, if the outer flange 30 is bent upward, the outer flange 30 will be connected to the machine room 4.
Moreover, even if tape or the like is to be applied auxiliary, it can be done from above the bottom plate 2, making the work easier.

(G) Effects of the Invention According to the method of the present invention, the seven flange on the outer periphery of the bottom plate comes into close contact with the inner surface of the side wall due to its own elastic force due to the pressing pressure from the foaming jig, and plays the role of a seal when filling the insulation foam with foam. Because I will fulfill
The need for sealing material between the bottom plate and side walls can be eliminated and reduced, simplifying the assembly process and reducing material costs. Further, since the outer periphery 7 flange is bent with a relatively large bending radius, so-called dents will not occur even if the side wall is pressed.

[Brief explanation of drawings]

Figure 1 is a sectional view of the lower part of the refrigerator, Figure 2 is A-A in Figure 1.
3 is a perspective view of the bottom plate, and FIG. 4 is a sectional view taken along the line B--B of FIG. 1 before filling with a heat insulating material. 1... Refrigerator, 2... Bottom plate, 11... Insulating box body,
12... Pedestal leg angle, 30... Outer circumference 7 lunge, 3
5... Foaming jig, R... Bent part. Figure 1 Figure 2a 3a

Claims (1)

[Claims] 1) The outer circumferential flange of the bottom plate constituting the outer box of the insulating box is bent to expand outward with a relatively large bending radius, and the outer circumferential flange is applied to the inner surface of the side wall constituting the outer box. A method for manufacturing a heat insulating box for a refrigerator or the like, characterized in that a heat insulating material is foamed and filled between the outer box and the inner box while the side walls are brought into contact with each other and pressed from the outside with a foaming jig.